Ceramic Baghouse Technology Controls Multiple Pollutants with
A ceramic baghouse system developed by Tri-Mer Corp removes particulate matter (PM), NOX, SO2, HCl, dioxins, and mercury in a single system. Particulate matter is reduced to ultra-low levels (<2 mg/Nm3, 0.001 grains/dscf); other pollutants are removed at percentages of 90% and higher. The Tri-Mer “UltraCat” and “UltraTemp” ceramic baghouse systems are cost-effective solutions to numerous air pollution challenges.
Control of Particulate
The typical particulate level at the outlet of the ceramic filters is less than 0.001 grains/dscf (2.0 mg/Nm3). This is the case even with loadings of several thousand milligrams per cubic meter. PM is captured superficially, and does not depth-load into the filter. Typical filter life is 5 to 10 years. The filters are effective across a wide span of particle sizes, but are most effectively used when the application involves elevated temperatures, or a large percentage of PM2.5 and submicron particulate.
Control of SO2 and Acid Gases
UltraTemp and UltraCat ceramic baghouse systems accommodate dry injection of calcium or sodium-based sorbents. Injected in the duct, upstream of the filter modules, these sorbent materials are readily captured along with pollutant gases. With sorbent injection, SO2 removal is generally 90% or higher, with removal efficiencies up to 97%. HCl removal averages 95% percent, and is often as high as 99%. 300°F to 1200°F is the temperature range for effective removal.
Control of NOx and Dioxin
The UltraCat ceramic baghouse system is available with nanobits of SCR catalyst embedded in the filter walls. The catalyst embedded in the filters destroys NOX with up to 95% percent efficiency.
Notably, the operating temperature required for high NOX destruction is just 350°F to 400°F, compared to the 600°F to 650°F required by conventional SCR.
In addition to the need for high temperatures, a disadvantage of traditional SCRs is catalyst poisoning – usually from particulate, metals and HCl. The catalyst used in the Tri-Mer ceramic baghouse system has a proprietary formulation and structure that protects the catalyst from blinding. Dioxins are also broken down by the catalyst, with destruction efficiency typically 97% to 99%.
Multi-pollutant capability creates a powerful, singular solution that is superior, to operating a separate control device for each pollutant. Especially with NOX, there is often insufficient temperature to operate traditional SCR. Low-temperature NOX removal capability opens a new direction in NOX control for operators of boilers, and other processes requiring NOX control.
Control of Mercury
Tri-Mer’s ceramic baghouse systems are compatible with standard mercury removal techniques. The filters accommodate very high particulate loads while maintaining exceptionally low outlet levels. Just as the addition of dry sorbents for the removal of acid gases is effective, so is the addition of powdered activated carbon for mercury. Very high levels of mercury capture have also been achieved in applications with injected powdered trona.
UltraTemp and UltraCat Filter ceramic baghouse systems are excellent alternatives for cost-effective hot gas filtration. There are now more than 400 applications worldwide using the fibrous ceramic filter elements that are the heart of these systems. This proven technology is now commercially available throughout the US, exclusively from Tri-Mer Corp.
For more information, contact Kevin Moss,
Tri-Mer Business Development Director, Advanced Technologies.
Direct line: (801) 294-5422, or firstname.lastname@example.org
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